Γιώργος Νεοφώτιστος Τμήμα Φυσικής, Πανεπιστήμιο Κρήτης Μαθαίνοντας για το περιβάλλον

Australian Institute of Physics (Vic Branch) Education Committee

Γιώργος Νεοφώτιστος, Πανεπιστήμιο Κρήτης

Australian Institute of Physics (Vic Branch) Education Committee Climate change impacts Greenland ice sheet The Greenland summer ice melt is getting larger at a worrying rate.

Australian Institute of Physics (Vic Branch) Education Committee Muir Glacier, Alaska Photo credit: Global Warming Art

Australian Institute of Physics (Vic Branch) Education CommitteeArgentina

“This is not just an environmental problem. It is a defence problem. It is a problem for those who deal with economics and development, conflict prevention, agriculture, finance, housing, transport … trade and health”. UK Foreign Secretary, Margaret Beckett, The Age, Oct. 26, 2006

Γιώργος Νεοφώτιστος, Πανεπιστήμιο Κρήτης

Australian Institute of Physics (Vic Branch) Education Committee Ηλεκτρομαγνητική ακτινοβολία από ένα θερμό σώμα

Australian Institute of Physics (Vic Branch) Education Committee Τι καθορίζει τη θερμοκρασία της Γης στην επιφάνειά της? Light from the Sun heats the Earth … Light from the Sun Earth The Earth then radiates the heat away…

Australian Institute of Physics (Vic Branch) Education Committee Light reflected from Earth Average Value 100 watts per square metre Light from the Sun Average Value 340 watts per square metre

Australian Institute of Physics (Vic Branch) Education Committee Τι καθορίζει τη θερμοκρασία της Γης στην επιφάνειά της? Light from the Sun heats the Earth… Average Value 240 watts per square metre Average Value 240 watts per square metre

Australian Institute of Physics (Vic Branch) Education Committee ~ 100 μόρια O2O2 Ar N2N2

Australian Institute of Physics (Vic Branch) Education Committee Τι καθορίζει τη θερμοκρασία της Γης στην επιφάνειά της? How hot must the Earth be to radiate 240 W/m 2 ? Average Value 240 watts per square metre -18 °C

Australian Institute of Physics (Vic Branch) Education Committee ~ 1200 μόρια Water(H 2 O)

Australian Institute of Physics (Vic Branch) Education Committee ~ μόρια Carbon dioxide (CO 2 )

Australian Institute of Physics (Vic Branch) Education Committee Concentration in 19 th century Carbon dioxide (CO 2 ) Added in 20 th Century

Australian Institute of Physics (Vic Branch) Education Committee H 2 O και CO 2 H 2 O και CO 2

Australian Institute of Physics (Vic Branch) Education Committee Infra RedUltra VioletVisible

Australian Institute of Physics (Vic Branch) Education Committee Observed Temperature changes

Australian Institute of Physics (Vic Branch) Education Committee

Γιώργος Νεοφώτιστος, Πανεπιστήμιο Κρήτης

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Australian Institute of Physics (Vic Branch) Education Committee What determines the Earth ’ s surface temperature? In balance at + 15 °C…In balance at + 15 °C… On Average: 240 W/m 2 On Average: 390 W/m W/m 2 sent back to Earth Average: 240 W/m 2